Ingredients for 20 servings:
1. 1/2 cup tomato puree
2. 1 tablespoon sugar
3. 3 tablespoons cider vinegar
4. 1 tablespoon olive oil
5. 1 medium onion, peeled and sliced thin
6. 3 sweet red peppers or 3 green bell peppers, sliced thin
7. 1 medium cubanelle pepper, sliced thin
8. salt & freshly ground black pepper
9. 4 tomatoes, sliced thin
10. 1 cup hot water

Directions:
1. In a bowl, combine tomato puree, sugar, and vinegar; set aside.
2. Heat oil in a skillet over medium high heat; saute onions until their edges start to brown.
3. Add sliced peppers, season with salt and pepper to taste, and saute over medium low for 2 or 3 minutes.
4. Stir in tomatoes.
5. Stir in the tomato puree mixture.
6. Add 1 cup hot water and simmer until sauce thickens, about 45 to 60 minutes.